From 6ceb3b27b1edd1112f1879cc1f149d39a3da2dc2 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Fri, 13 Jan 2017 15:57:03 +0100 Subject: spi/topcliff-pch: Delete an unnecessary return statement in two functions The script "checkpatch.pl" pointed information out like the following. WARNING: void function return statements are not generally useful Thus remove such statements here. Signed-off-by: Markus Elfring Signed-off-by: Mark Brown --- drivers/spi/spi-topcliff-pch.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index fcb9910..250452a 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -915,7 +915,6 @@ static void pch_spi_release_dma(struct pch_spi_data *data) dma_release_channel(dma->chan_rx); dma->chan_rx = NULL; } - return; } static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw) @@ -1292,7 +1291,6 @@ static void pch_free_dma_buf(struct pch_spi_board_data *board_dat, if (dma->rx_buf_dma) dma_free_coherent(&board_dat->pdev->dev, PCH_BUF_SIZE, dma->rx_buf_virt, dma->rx_buf_dma); - return; } static void pch_alloc_dma_buf(struct pch_spi_board_data *board_dat, -- cgit v1.1 From 84aa0ba12442fa46f461c491c42efdadf6995c96 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Fri, 13 Jan 2017 15:25:22 +0100 Subject: spi/topcliff-pch: Use kcalloc() in pch_spi_handle_dma() * Multiplications for the size determination of memory allocations indicated that array data structures should be processed. Thus use the corresponding function "kcalloc". This issue was detected by using the Coccinelle software. * Replace the specification of a data structure by pointer dereferences to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring Signed-off-by: Mark Brown --- drivers/spi/spi-topcliff-pch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 250452a..1beeb16 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -1007,7 +1007,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw) spin_unlock_irqrestore(&data->lock, flags); /* RX */ - dma->sg_rx_p = kzalloc(sizeof(struct scatterlist)*num, GFP_ATOMIC); + dma->sg_rx_p = kcalloc(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC); sg_init_table(dma->sg_rx_p, num); /* Initialize SG table */ /* offset, length setting */ sg = dma->sg_rx_p; @@ -1067,7 +1067,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw) head = 0; } - dma->sg_tx_p = kzalloc(sizeof(struct scatterlist)*num, GFP_ATOMIC); + dma->sg_tx_p = kcalloc(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC); sg_init_table(dma->sg_tx_p, num); /* Initialize SG table */ /* offset, length setting */ sg = dma->sg_tx_p; -- cgit v1.1 From baa35f5734aa1c0207e4e6b8e15079475b1fa252 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Fri, 13 Jan 2017 15:46:35 +0100 Subject: spi/topcliff-pch: Improve size determinations in pch_spi_probe() Replace the specification of data structures by pointer dereferences as the parameter for the operator "sizeof" to make the corresponding size determination a bit safer. Signed-off-by: Markus Elfring Signed-off-by: Mark Brown --- drivers/spi/spi-topcliff-pch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 1beeb16..0a876311 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -1539,11 +1539,11 @@ static int pch_spi_probe(struct pci_dev *pdev, const struct pci_device_id *id) int i; struct pch_pd_dev_save *pd_dev_save; - pd_dev_save = kzalloc(sizeof(struct pch_pd_dev_save), GFP_KERNEL); + pd_dev_save = kzalloc(sizeof(*pd_dev_save), GFP_KERNEL); if (!pd_dev_save) return -ENOMEM; - board_dat = kzalloc(sizeof(struct pch_spi_board_data), GFP_KERNEL); + board_dat = kzalloc(sizeof(*board_dat), GFP_KERNEL); if (!board_dat) { retval = -ENOMEM; goto err_no_mem; -- cgit v1.1 From b996356d305fd311eaa652890b255a0ff4d13de4 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Fri, 13 Jan 2017 16:36:09 +0100 Subject: spi/topcliff-pch: Combine substrings for four messages The script "checkpatch.pl" pointed information out like the following. WARNING: quoted string split across lines Thus fix the affected source code places. Signed-off-by: Markus Elfring Signed-off-by: Mark Brown --- drivers/spi/spi-topcliff-pch.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 0a876311..2b94058 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -622,8 +622,9 @@ static void pch_spi_set_tx(struct pch_spi_data *data, int *bpw) if (n_writes > PCH_MAX_FIFO_DEPTH) n_writes = PCH_MAX_FIFO_DEPTH; - dev_dbg(&data->master->dev, "\n%s:Pulling down SSN low - writing " - "0x2 to SSNXCR\n", __func__); + dev_dbg(&data->master->dev, + "\n%s:Pulling down SSN low - writing 0x2 to SSNXCR\n", + __func__); pch_spi_writereg(data->master, PCH_SSNXCR, SSN_LOW); for (j = 0; j < n_writes; j++) @@ -1180,14 +1181,16 @@ static void pch_spi_process_messages(struct work_struct *pwork) data->cur_trans = list_entry(data->current_msg->transfers.next, struct spi_transfer, transfer_list); - dev_dbg(&data->master->dev, "%s " - ":Getting 1st transfer message\n", __func__); + dev_dbg(&data->master->dev, + "%s :Getting 1st transfer message\n", + __func__); } else { data->cur_trans = list_entry(data->cur_trans->transfer_list.next, struct spi_transfer, transfer_list); - dev_dbg(&data->master->dev, "%s " - ":Getting next transfer message\n", __func__); + dev_dbg(&data->master->dev, + "%s :Getting next transfer message\n", + __func__); } spin_unlock(&data->lock); @@ -1232,9 +1235,8 @@ static void pch_spi_process_messages(struct work_struct *pwork) /* check for delay */ if (data->cur_trans->delay_usecs) { - dev_dbg(&data->master->dev, "%s:" - "delay in usec=%d\n", __func__, - data->cur_trans->delay_usecs); + dev_dbg(&data->master->dev, "%s:delay in usec=%d\n", + __func__, data->cur_trans->delay_usecs); udelay(data->cur_trans->delay_usecs); } -- cgit v1.1 From 45e861a1c12cfd717b8e47103f1aaf2e34cc6688 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Fri, 13 Jan 2017 17:00:08 +0100 Subject: spi/topcliff-pch: Delete an error message for a failed memory allocation in pch_spi_set_tx() Omit an extra message for a memory allocation failure in this function. Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf Signed-off-by: Markus Elfring Signed-off-by: Mark Brown --- drivers/spi/spi-topcliff-pch.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 2b94058..97d1375 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -591,7 +591,6 @@ static void pch_spi_set_tx(struct pch_spi_data *data, int *bpw) if (!data->pkt_rx_buff) { /* flush queue and set status of all transfers to -ENOMEM */ - dev_err(&data->master->dev, "%s :kzalloc failed\n", __func__); list_for_each_entry_safe(pmsg, tmp, data->queue.next, queue) { pmsg->status = -ENOMEM; -- cgit v1.1 From cce59c225920309e03c2ea350ed6a0e233e33963 Mon Sep 17 00:00:00 2001 From: Prahlad V Date: Fri, 17 Feb 2017 02:03:35 +0530 Subject: spi: ti-qspi: revise ti_qspi_probe() failure flow call spi_master_put() in case of failures after spi_alloc_master(). call pm_runtime_disable() in case of failures after pm_runtime_enable(). Signed-off-by: Prahlad V Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index ec6fb09..e784d0f 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -652,7 +652,8 @@ static int ti_qspi_probe(struct platform_device *pdev) r = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (r == NULL) { dev_err(&pdev->dev, "missing platform data\n"); - return -ENODEV; + ret = -ENODEV; + goto free_master; } } @@ -669,7 +670,8 @@ static int ti_qspi_probe(struct platform_device *pdev) irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(&pdev->dev, "no irq resource?\n"); - return irq; + ret = irq; + goto free_master; } mutex_init(&qspi->list_lock); @@ -685,15 +687,17 @@ static int ti_qspi_probe(struct platform_device *pdev) qspi->ctrl_base = syscon_regmap_lookup_by_phandle(np, "syscon-chipselects"); - if (IS_ERR(qspi->ctrl_base)) - return PTR_ERR(qspi->ctrl_base); + if (IS_ERR(qspi->ctrl_base)) { + ret = PTR_ERR(qspi->ctrl_base); + goto free_master; + } ret = of_property_read_u32_index(np, "syscon-chipselects", 1, &qspi->ctrl_reg); if (ret) { dev_err(&pdev->dev, "couldn't get ctrl_mod reg index\n"); - return ret; + goto free_master; } } @@ -742,6 +746,7 @@ no_dma: if (!ret) return 0; + pm_runtime_disable(&pdev->dev); free_master: spi_master_put(master); return ret; -- cgit v1.1 From 7abfe04c47d97243a7aeeb8fe211a15687bff67f Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Sat, 18 Feb 2017 10:42:02 +0100 Subject: spi: spi-ti-qspi: Fix error handling 'dma_request_chan_by_mask()' can not return NULL. Try to keep the logic in 'no_dma:' by resetting 'qspi->rx_chan' in case of error. Signed-off-by: Christophe JAILLET Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index e784d0f..ad76a44 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -718,9 +718,10 @@ static int ti_qspi_probe(struct platform_device *pdev) dma_cap_set(DMA_MEMCPY, mask); qspi->rx_chan = dma_request_chan_by_mask(&mask); - if (!qspi->rx_chan) { + if (IS_ERR(qspi->rx_chan)) { dev_err(qspi->dev, "No Rx DMA available, trying mmap mode\n"); + qspi->rx_chan = NULL; ret = 0; goto no_dma; } -- cgit v1.1